define([], function() {
    var exports = {};

    (function(exports) {
        function newLine(draws, indent, step, option) {
            for (var i = draws.length - 1; i >= 0; i--) {
                if (/\n+\S*/.test(draws[i])) {
                    draws.pop();
                    i--;
                }
                break;
            }

            if (option) {
                if (option.current && draws.length - 1 > -1) {
                    if (option.current == '}') {
                        if (draws[draws.length - 1] == '{') {
                            return;
                        }
                    } else if (option.current == ']') {
                        if (draws[draws.length - 1] == '[') {
                            return;
                        }
                    } else if (option.current == '/') {
                        for (var i = option.index - 1; i >= 0; i--) {
                            var char = option.text.charAt(i);
                            if (char == '\n') {
                                break;
                            } else if (char != ' ' && char != '\t') {
                                return;
                            }
                        }
                    }
                }
            }

            var text = '\n';
            for (var i = 0; i < indent; i++) {
                text += step;
            }
            draws.push(text);
        }


        function addBlank(draws) {
            var text = '';
            for (var i = draws.length - 1; i >= 0; i--) {
                if (/\n+\S*/.test(draws[i])) {
                    if (text.trim()) {
                        draws.push(' ');
                    }
                    break;
                }
                text += draws[i];
            }
        }

        exports.format = function(text, step) {
            var draws = [];
            var indent = 0;

            var quoteOddEven = 0,
                squoteOddEven = 0,
                commentOddEven = 0;

            var previous = '',
                current = '',
                next = '';

            for (var i = 0; i < text.length; i++) {
                previous = (i - 1 > -1 ? text.charAt(i - 1) : '');
                current = text.charAt(i);
                next = (i + 1 < text.length ? text.charAt(i + 1) : '');
                switch(current) {
                case '{':
                case '[':
                    draws.push(current);
                    if (commentOddEven == 0) {
                        if (quoteOddEven == 0 && squoteOddEven == 0) {
                            indent++;
                            newLine(draws, indent, step);
                        }
                    }
                    break;
                case '}':
                case ']':
                    if (commentOddEven == 0) {
                        if (quoteOddEven == 0 && squoteOddEven == 0) {
                            indent--;
                            newLine(draws, indent, step, {
                                current: current
                            });
                        }
                    }
                    draws.push(current);
                    break;
                case '/':
                    if (quoteOddEven == 0 && squoteOddEven == 0) {
                        if (next == '*') {
                            commentOddEven = 1;
                            newLine(draws, indent, step, {
                                current: current,
                                text: text,
                                index: i
                            });
                            addBlank(draws);
                        } else if (previous == '*') {
                            commentOddEven = 0;
                            draws.push(current);
                            newLine(draws, indent, step);
                            break;
                        } else if (next == '/' && commentOddEven == 0) {
                            newLine(draws, indent, step, {
                                current: current,
                                text: text,
                                index: i
                            });
                            addBlank(draws);
                            var comment = '';
                            for (var j = i; j < text.length; j++) {
                                i = j;
                                current = text.charAt(j);
                                if (current == '\n') {
                                    draws.push(comment.trim());
                                    newLine(draws, indent, step);
                                    break;
                                }
                                comment += current;
                            }
                            if (current != '\n') {
                                draws.push(comment.trim());
                            }
                            break;
                        }
                    }
                    draws.push(current);
                    break;
                case ' ':
                case '\t':
                case '\r':
                case '\n':
                    if (commentOddEven != 0 || quoteOddEven != 0 || squoteOddEven != 0) {
                        draws.push(current);
                    }
                    break;
                case '"':
                    if (commentOddEven == 0 && squoteOddEven == 0) {
                        if (previous != '\\') {
                            if (quoteOddEven == 0) {
                                quoteOddEven = 1;
                            } else if (quoteOddEven == 1) {
                                quoteOddEven = 0;
                            }
                        }
                    }
                    draws.push(current);
                    break;
                case "'":
                    if (commentOddEven == 0 && quoteOddEven == 0) {
                        if (previous != '\\') {
                            if (squoteOddEven == 0) {
                                squoteOddEven = 1;
                            } else if (squoteOddEven == 1) {
                                squoteOddEven = 0;
                            }
                        }
                    }
                    draws.push(current);
                    break;
                case ':':
                    draws.push(current);
                    if (commentOddEven == 0) {
                        if (quoteOddEven == 0 && squoteOddEven == 0) {
                            draws.push(' ');
                        }
                    }
                    break;
                case ',':
                    draws.push(current);
                    if (commentOddEven == 0) {
                        if (quoteOddEven == 0 && squoteOddEven == 0) {
                            newLine(draws, indent, step);
                        }
                    }
                    break;
                default: 
                    draws.push(current);
                    break;
                }
            }

            return draws.join('').trim();
        }
    })(exports);

    (function(exports) {
        "use strict";
        const unicode = {
            Space_Separator: /[\u1680\u2000-\u200A\u202F\u205F\u3000]/,
            ID_Start: 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3[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC03-\uDC37\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE80-\uDEAA\uDF00-\uDF19]|\uD806[\uDCA0-\uDCDF\uDCFF\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE83\uDE86-\uDE89\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50\uDF93-\uDF9F\uDFE0\uDFE1]|\uD821[\uDC00-\uDFEC]|\uD822[\uDC00-\uDEF2]|\uD82C[\uDC00-\uDD1E\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB]|\uD83A[\uDC00-\uDCC4\uDD00-\uDD43]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]/,
            ID_Continue: 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FF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF2D-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDCA-\uDDCC\uDDD0-\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE37\uDE3E\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF50\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC00-\uDC4A\uDC50-\uDC59\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDDD8-\uDDDD\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9\uDF00-\uDF19\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDCA0-\uDCE9\uDCFF\uDE00-\uDE3E\uDE47\uDE50-\uDE83\uDE86-\uDE99\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC36\uDC38-\uDC40\uDC50-\uDC59\uDC72-\uDC8F\uDC92-\uDCA7\uDCA9-\uDCB6\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD36\uDD3A\uDD3C\uDD3D\uDD3F-\uDD47\uDD50-\uDD59]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F\uDFE0\uDFE1]|\uD821[\uDC00-\uDFEC]|\uD822[\uDC00-\uDEF2]|\uD82C[\uDC00-\uDD1E\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD838[\uDC00-\uDC06\uDC08-\uDC18\uDC1B-\uDC21\uDC23\uDC24\uDC26-\uDC2A]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6\uDD00-\uDD4A\uDD50-\uDD59]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF]/
        };

        const util = {
            isSpaceSeparator: function(c) {
                return unicode.Space_Separator.test(c)
            },
            isIdStartChar: function(c) {
                return (
                    (c >= 'a' && c <= 'z') ||
                    (c >= 'A' && c <= 'Z') ||
                    (c === '$') || (c === '_') ||
                    unicode.ID_Start.test(c)
                );
            },
            isIdContinueChar: function(c) {
                return (
                    (c >= 'a' && c <= 'z') ||
                    (c >= 'A' && c <= 'Z') ||
                    (c >= '0' && c <= '9') ||
                    (c === '$') || (c === '_') ||
                    (c === '\u200C') || (c === '\u200D') ||
                    unicode.ID_Continue.test(c)
                );
            },
            isDigit: function(c) {
                return /[0-9]/.test(c)
            },
            isHexDigit: function(c) {
                return /[0-9A-Fa-f]/.test(c)
            }
        };

        var source;
        var parseState;
        var stack;
        var pos;
        var line;
        var column;
        var token;
        var key;
        var root;
        var commentStack;

        exports.parse = function(text, reviver) {
            source = String(text);
            parseState = 'start';
            stack = [];
            pos = 0;
            line = 1;
            column = 0;
            token = undefined;
            key = undefined;
            root = undefined;
            commentStack = [];

            do {
                token = lex();
                parseStates[parseState]();
            } while (token.type !== 'eof')

            if (typeof reviver === 'function') {
                return internalize({'': root}, '', reviver);
            }

            return root
        }

        function internalize(holder, name, reviver) {
            const value = holder[name]
            if (value != null && typeof value === 'object') {
                for (var key in value) {
                    const replacement = internalize(value, key, reviver)
                    if (replacement === undefined) {
                        delete value[key]
                    } else {
                        value[key] = replacement
                    }
                }
            }

            return reviver.call(holder, name, value)
        }

        var lexState;
        var buffer;
        var doubleQuote;
        var sign;
        var c;

        function lex() {
            lexState = 'default';
            buffer = '';
            doubleQuote = false;
            sign = 1;

            for (;;) {
                c = peek();
                const token = lexStates[lexState]();
                if (token) {
                    return token;
                }
            }
        }

        function peek() {
            if (source[pos]) {
                return String.fromCodePoint(source.codePointAt(pos));
            }
        }

        function read() {
            const c = peek();

            if (c === '\n') {
                line++;
                column = 0;
            } else if (c) {
                column += c.length;
            } else {
                column++;
            }

            if (c) {
                pos += c.length;
            }

            return c;
        }

        const lexStates = {
            'default': function() {
                switch (c) {
                case '\t':
                case '\v':
                case '\f':
                case ' ':
                case '\u00A0':
                case '\uFEFF':
                case '\n':
                case '\r':
                case '\u2028':
                case '\u2029':
                    read();
                    if (c != ' ') {
                        popComment();
                    }
                    return;
                case '/':
                    read();
                    lexState = 'comment';
                    return;
                case undefined:
                    read();
                    return newToken('eof');
                }
                if (util.isSpaceSeparator(c)) {
                    read();
                    return;
                }

                return lexStates[parseState]();
            },
            comment: function() {
                switch (c) {
                case '*':
                    read();
                    buffer = '';
                    lexState = 'multiLineComment';
                    return;
                case '/':
                    read();
                    buffer = '';
                    lexState = 'singleLineComment';
                    return;
                }

                throw invalidChar(read());
            },
            multiLineComment: function() {
                switch (c) {
                case '*':
                    read();
                    lexState = 'multiLineCommentAsterisk';
                    return;
                case undefined:
                    throw invalidChar(read());
                }
                buffer += read();
            },
            multiLineCommentAsterisk: function() {
                switch (c) {
                case '*':
                    read();
                    return;
                case '/':
                    pushComment(buffer);
                    buffer = '';
                    read();
                    lexState = 'default';
                    return;
                case undefined:
                    throw invalidChar(read());
                }

                buffer += read();
                lexState = 'multiLineComment';
            },
            singleLineComment: function() {
                switch (c) {
                case '\n':
                case '\r':
                case '\u2028':
                case '\u2029':
                    pushComment(buffer);
                    buffer = '';
                    read();
                    lexState = 'default';
                    popComment();
                    return;
                case undefined:
                    read();
                    return newToken('eof');
                }

                buffer += read();
            },
            value: function() {
                switch (c) {
                case '{':
                case '[':
                    pushComment(true);
                    return newToken('punctuator', read());
                case 'n':
                    read();
                    literal('ull');
                    return newToken('null', null);
                case 't':
                    read();
                    literal('rue');
                    return newToken('boolean', true);
                case 'f':
                    read();
                    literal('alse');
                    return newToken('boolean', false);
                case '-':
                case '+':
                    if (read() === '-') {
                        sign = -1;
                    }
                    lexState = 'sign';
                    return;
                case '.':
                    buffer = read();
                    lexState = 'decimalPointLeading';
                    return;
                case '0':
                    buffer = read();
                    lexState = 'zero';
                    return;
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
                    buffer = read();
                    lexState = 'decimalInteger';
                    return;
                case 'I':
                    read();
                    literal('nfinity');
                    return newToken('numeric', Infinity);
                case 'N':
                    read();
                    literal('aN');
                    return newToken('numeric', NaN);
                case '"':
                case "'":
                    doubleQuote = (read() === '"');
                    buffer = '';
                    lexState = 'string';
                    return;
                }

                throw invalidChar(read());
            },
            identifierNameStartEscape: function() {
                if (c !== 'u') {
                    throw invalidChar(read());
                }

                read();
                const u = unicodeEscape();
                switch (u) {
                case '$':
                case '_':
                    break;
                default:
                    if (!util.isIdStartChar(u)) {
                        throw invalidIdentifier();
                    }
                    break;
                }

                buffer += u;
                lexState = 'identifierName';
            },
            identifierName: function() {
                switch (c) {
                case '$':
                case '_':
                case '\u200C':
                case '\u200D':
                    buffer += read();
                    return;
                case '\\':
                    read();
                    lexState = 'identifierNameEscape';
                    return;
                }

                if (util.isIdContinueChar(c)) {
                    buffer += read();
                    return;
                }

                return newToken('identifier', buffer);
            },
            identifierNameEscape: function() {
                if (c !== 'u') {
                    throw invalidChar(read());
                }

                read();
                const u = unicodeEscape();
                switch (u) {
                case '$':
                case '_':
                case '\u200C':
                case '\u200D':
                    break
                default:
                    if (!util.isIdContinueChar(u)) {
                        throw invalidIdentifier();
                    }
                    break;
                }

                buffer += u;
                lexState = 'identifierName';
            },
            sign: function() {
                switch (c) {
                case '.':
                    buffer = read();
                    lexState = 'decimalPointLeading';
                    return;
                case '0':
                    buffer = read();
                    lexState = 'zero';
                    return;
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
                    buffer = read();
                    lexState = 'decimalInteger';
                    return;
                case 'I':
                    read();
                    literal('nfinity');
                    return newToken('numeric', sign * Infinity);
                case 'N':
                    read();
                    literal('aN');
                    return newToken('numeric', NaN);
                }

                throw invalidChar(read());
            },
            zero: function() {
                switch (c) {
                case '.':
                    buffer += read();
                    lexState = 'decimalPoint';
                    return;
                case 'e':
                case 'E':
                    buffer += read();
                    lexState = 'decimalExponent';
                    return;
                case 'x':
                case 'X':
                    buffer += read();
                    lexState = 'hexadecimal';
                    return;
                }

                return newToken('numeric', sign * 0);
            },
            decimalInteger: function() {
                switch (c) {
                case '.':
                    buffer += read();
                    lexState = 'decimalPoint';
                    return;
                case 'e':
                case 'E':
                    buffer += read();
                    lexState = 'decimalExponent';
                    return;
                }

                if (util.isDigit(c)) {
                    buffer += read();
                    return;
                }

                return newToken('numeric', sign * Number(buffer));
            },
            decimalPointLeading: function() {
                if (util.isDigit(c)) {
                    buffer += read();
                    lexState = 'decimalFraction';
                    return;
                }

                throw invalidChar(read());
            },
            decimalPoint: function() {
                switch (c) {
                case 'e':
                case 'E':
                    buffer += read();
                    lexState = 'decimalExponent';
                    return;
                }

                if (util.isDigit(c)) {
                    buffer += read();
                    lexState = 'decimalFraction';
                    return;
                }

                return newToken('numeric', sign * Number(buffer));
            },
            decimalFraction: function() {
                switch (c) {
                case 'e':
                case 'E':
                    buffer += read();
                    lexState = 'decimalExponent';
                    return;
                }

                if (util.isDigit(c)) {
                    buffer += read();
                    return;
                }

                return newToken('numeric', sign * Number(buffer));
            },
            decimalExponent: function() {
                switch (c) {
                case '+':
                case '-':
                    buffer += read();
                    lexState = 'decimalExponentSign';
                    return;
                }

                if (util.isDigit(c)) {
                    buffer += read();
                    lexState = 'decimalExponentInteger';
                    return;
                }

                throw invalidChar(read());
            },
            decimalExponentSign: function() {
                if (util.isDigit(c)) {
                    buffer += read();
                    lexState = 'decimalExponentInteger';
                    return;
                }

                throw invalidChar(read());
            },
            decimalExponentInteger: function() {
                if (util.isDigit(c)) {
                    buffer += read();
                    return;
                }

                return newToken('numeric', sign * Number(buffer));
            },
            hexadecimal: function() {
                if (util.isHexDigit(c)) {
                    buffer += read();
                    lexState = 'hexadecimalInteger';
                    return;
                }

                throw invalidChar(read());
            },
            hexadecimalInteger: function() {
                if (util.isHexDigit(c)) {
                    buffer += read();
                    return;
                }

                return newToken('numeric', sign * Number(buffer));
            },
            string: function() {
                switch (c) {
                case '\\':
                    read();
                    buffer += escape();
                    return;
                case '"':
                    if (doubleQuote) {
                        read();
                        return newToken('string', buffer);
                    }
                    buffer += read();
                    return;
                case "'":
                    if (!doubleQuote) {
                        read();
                        return newToken('string', buffer);
                    }
                    buffer += read();
                    return;
                case '\n':
                case '\r':
                    throw invalidChar(read());
                case '\u2028':
                case '\u2029':
                    separatorChar(c);
                    break;
                case undefined:
                    throw invalidChar(read());
                }

                buffer += read();
            },
            start: function() {
                switch (c) {
                case '{':
                case '[':
                    pushComment(true);
                    return newToken('punctuator', read());
                }

                lexState = 'value';
            },
            beforePropertyName: function() {
                switch (c) {
                case '$':
                case '_':
                    buffer = read();
                    lexState = 'identifierName';
                    return;
                case '\\':
                    read();
                    lexState = 'identifierNameStartEscape';
                    return;
                case '}':
                    popComment('remove');
                    return newToken('punctuator', read());
                case '"':
                case "'":
                    doubleQuote = (read() === '"');
                    lexState = 'string';
                    return;
                }

                if (util.isIdStartChar(c)) {
                    buffer += read();
                    lexState = 'identifierName';
                    return;
                }

                throw invalidChar(read());
            },
            afterPropertyName: function() {
                if (c === ':') {
                    return newToken('punctuator', read());
                }

                throw invalidChar(read());
            },
            beforePropertyValue: function() {
                lexState = 'value';
            },
            afterPropertyValue: function() {
                switch (c) {
                case '}':
                    popComment('remove');
                case ',':
                    return newToken('punctuator', read());
                }

                throw invalidChar(read());
            },
            beforeArrayValue: function() {
                if (c === ']') {
                    return newToken('punctuator', read());
                }

                lexState = 'value';
            },
            afterArrayValue: function() {
                switch (c) {
                case ']':
                    popComment('remove');
                case ',':
                    return newToken('punctuator', read());
                }

                throw invalidChar(read());
            },
            end: function() {
                throw invalidChar(read());
            },
        }

        function newToken(type, value) {
            return {
                type: type,
                value: value,
                line: line,
                column: column
            };
        }

        function literal(s) {
            for (var i in s) {
                const c = s[i];
                const p = peek();

                if (p !== c) {
                    throw invalidChar(read());
                }

                read();
            }
        }

        function escape() {
            const c = peek();
            switch (c) {
            case 'b':
                read();
                return '\b';
            case 'f':
                read();
                return '\f';
            case 'n':
                read();
                return '\n';
            case 'r':
                read();
                return '\r';
            case 't':
                read();
                return '\t';
            case 'v':
                read();
                return '\v'
            case '0':
                read();
                if (util.isDigit(peek())) {
                    throw invalidChar(read());
                }
                return '\0';
            case 'x':
                read();
                return hexEscape();
            case 'u':
                read();
                return unicodeEscape();
            case '\n':
            case '\u2028':
            case '\u2029':
                read();
                return '';
            case '\r':
                read();
                if (peek() === '\n') {
                    read();
                }
                return '';
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
                throw invalidChar(read());
            case undefined:
                throw invalidChar(read());
            }

            return read();
        }

        function hexEscape() {
            var buffer = '';
            var c = peek();

            if (!util.isHexDigit(c)) {
                throw invalidChar(read());
            }

            buffer += read();

            c = peek();
            if (!util.isHexDigit(c)) {
                throw invalidChar(read());
            }

            buffer += read();

            return String.fromCodePoint(parseInt(buffer, 16));
        }

        function unicodeEscape() {
            var buffer = '';
            var count = 4;

            while (count-- > 0) {
                const c = peek();
                if (!util.isHexDigit(c)) {
                    throw invalidChar(read());
                }

                buffer += read();
            }

            return String.fromCodePoint(parseInt(buffer, 16));
        }

        const parseStates = {
            start: function() {
                if (token.type === 'eof') {
                    throw invalidEOF();
                }

                push();
            },
            beforePropertyName: function() {
                switch (token.type) {
                case 'identifier':
                case 'string':
                    key = token.value;
                    parseState = 'afterPropertyName';
                    return;
                case 'punctuator':
                    pop();
                    return;
                case 'eof':
                    throw invalidEOF();
                }
            },
            afterPropertyName: function() {
                if (token.type === 'eof') {
                    throw invalidEOF();
                }

                parseState = 'beforePropertyValue';
            },
            beforePropertyValue: function() {
                if (token.type === 'eof') {
                    throw invalidEOF();
                }

                push();
            },
            beforeArrayValue: function() {
                if (token.type === 'eof') {
                    throw invalidEOF();
                }

                if (token.type === 'punctuator' && token.value === ']') {
                    pop();
                    return;
                }

                push();
            },
            afterPropertyValue: function() {
                if (token.type === 'eof') {
                    throw invalidEOF();
                }

                switch (token.value) {
                case ',':
                    parseState = 'beforePropertyName';
                    return;
                case '}':
                    pop();
                }
            },
            afterArrayValue: function() {
                if (token.type === 'eof') {
                    throw invalidEOF();
                }

                switch (token.value) {
                case ',':
                    parseState = 'beforeArrayValue';
                    return;
                case ']':
                    pop();
                }
            },
            end: function() {}
        }

        function push() {
            var value;

            switch (token.type) {
            case 'punctuator':
                switch (token.value) {
                case '{':
                    value = {};
                    break;
                case '[':
                    value = [];
                    break;
                }
                break;
            case 'null':
            case 'boolean':
            case 'numeric':
            case 'string':
                value = token.value;
                break;
            }

            if (root === undefined) {
                root = value;
            } else {
                const parent = stack[stack.length - 1];
                if (Array.isArray(parent)) {
                    parent.push(value);
                } else {
                    parent[key] = value;
                    var comment = null;
                    if (value !== null && typeof value === 'object') {
                        comment = popComment('object');
                    } else {
                        comment = popComment('primitive');
                    }
                    parent[key + '__comments'] = comment.comments;
                }
            }

            if (value !== null && typeof value === 'object') {
                stack.push(value);

                if (Array.isArray(value)) {
                    parseState = 'beforeArrayValue';
                } else {
                    parseState = 'beforePropertyName';
                }
            } else {
                const current = stack[stack.length - 1];
                if (current == null) {
                    parseState = 'end';
                } else if (Array.isArray(current)) {
                    parseState = 'afterArrayValue';
                } else {
                    parseState = 'afterPropertyValue';
                }
            }
        }

        function pop() {
            stack.pop();

            const current = stack[stack.length - 1];
            if (current == null) {
                parseState = 'end';
            } else if (Array.isArray(current)) {
                parseState = 'afterArrayValue';
            } else {
                parseState = 'afterPropertyValue';
            }
        }

        function pushComment(value) {
            if (value === true) {
                var comment = { comments: [], hasDepField: false };
                commentStack.push(comment);
            } else {
                value = value.trim();
                if (commentStack.length == 0) {
                    var comment = { comments: [value], hasDepField: false };
                    commentStack.push(comment);
                } else {
                    commentStack[commentStack.length - 1].comments.push(value);
                }
            }
        }

        function popComment(value) {
            if (commentStack.length > 0) {
                var comment = commentStack[commentStack.length - 1];
                if (value === 'primitive') {
                    comment.hasDepField = true;
                } else if (value === 'remove') {
                    commentStack.pop();
                } else if (comment.hasDepField) {
                    commentStack.pop();
                    pushComment(true);
                }
                if (value === 'object' && commentStack.length > 1) {
                    comment = commentStack[commentStack.length - 2];
                    comment.hasDepField = true;
                }
                return comment;
            }
            return { comments: [], hasDepField: false };
        }

        function invalidChar(c) {
            if (c === undefined) {
                return syntaxError('JSON5: invalid end of input at ' + line + ':' + column);
            }

            return syntaxError('JSON5: invalid character ' + formatChar(c) + ' at ' + line + ':' + column);
        }

        function invalidEOF() {
            return syntaxError('JSON5: invalid end of input at ' + line + ':' + column);
        }

        function invalidIdentifier() {
            column -= 5;
            return syntaxError('JSON5: invalid identifier character at ' + line + ':' + column);
        }

        function separatorChar(c) {
            console.warn('JSON5: ' + formatChar(c) + ' in strings is not valid ECMAScript; consider escaping');
        }

        function formatChar(c) {
            const replacements = {
                "'": "\\'",
                '"': '\\"',
                '\\': '\\\\',
                '\b': '\\b',
                '\f': '\\f',
                '\n': '\\n',
                '\r': '\\r',
                '\t': '\\t',
                '\v': '\\v',
                '\0': '\\0',
                '\u2028': '\\u2028',
                '\u2029': '\\u2029',
            };

            if (replacements[c]) {
                return replacements[c];
            }

            if (c < ' ') {
                const hexString = c.charCodeAt(0).toString(16);
                return '\\x' + ('00' + hexString).substring(hexString.length);
            }

            return c;
        }

        function syntaxError(message) {
            const err = new SyntaxError(message);
            err.lineNumber = line;
            err.columnNumber = column;
            return err;
        }
    })(exports);

    return exports;
});
